Coupling Zero-Valent Iron and Fenton processes for degrading sulfamethazine, sulfathiazole, and norfloxacin

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dc.contributor.authorFornazaria, Ana Luiza
dc.contributor.authorLabriola, Vanessa Feltrin
dc.contributor.authorDa Silva, Bianca Ferreira [UNESP]
dc.contributor.authorCastro, Lucas Fernandes
dc.contributor.authorPerussi, Janice Rodrigues
dc.contributor.authorVieira, Eny Maria
dc.contributor.authorAzevedo, Eduardo Bessa
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2021-06-25T11:01:56Z
dc.date.available2021-06-25T11:01:56Z
dc.date.issued2021-08-01
dc.description.abstractIn this study, the degradation of three antibiotics - sulfamethazine (SMT), sulfathiazole (STZ), and norfloxacin (NOR) (1.0 mg L-1 each) - was achieved by coupling the Zero-Valent Iron Process using supported metallic iron nanoparticles (nZVI) to the Fenton one. The system was operated in single-pass continuous-flow mode at steady-state regime (after 15 min). The nanoparticles were packed into a fixed-bed reactor and characterized by several techniques (SEM, EDX, TEM, and XRD). The degradation experiments were performed according to a 22 factorial design, in which the effects of pH and flow rate (Q) were studied. The degradation conditions were: initial pH = 3.0 and Q = 20 mL min-1· H2O2 was then continuously added to the effluent of the nZVI reactor (containing Fe2+) in order to perform the Fenton process in the following mixing vessel (H2O2 concentration of 34 mg L-1). At the exit of the system, the antibiotics concentrations were below the detection limit of the chromatographic method (40 μg L-1) and dissolved iron was below 1.0 mg L-1. Sixteen degradation products (DPs) of SMT, STZ, and NOR were detected and identified using HPLC-MS/MS. Their ecotoxicological endpoints (LC50, EC50, and ChV) for three trophic levels were estimated with the aid of the ECOSAR 2.0 software. No ecotoxicity was generated towards Lactuca sativa during treatment. The proposed system was able to partially remove the antimicrobial activity (Escherichia coli) of both sulfonamides (16%) and NOR (47%).en
dc.description.affiliationUniversity of São Paulo (USP) São Carlos Institute of Chemistry Laboratório de Desenvolvimento de Tecnologias Ambientais (LDTAmb), Avenida Trabalhador São-Carlense, 400
dc.description.affiliationSão Paulo State University (UNESP) Araraquara Chemistry Institute Departamento de Química Analítica, Rua Prof. Francisco Degni, 55
dc.description.affiliationUniversity of São Paulo (USP) São Carlos Institute of Chemistry Grupo de Fotosensibilizadores, Avenida Trabalhador São-Carlense, 400
dc.description.affiliationUniversity of São Paulo (USP) São Carlos Institute of Chemistry Grupo de Química Analítica Ambiental e Ecotoxicologia, Avenida Trabalhador São-Carlense, 400
dc.description.affiliationUnespSão Paulo State University (UNESP) Araraquara Chemistry Institute Departamento de Química Analítica, Rua Prof. Francisco Degni, 55
dc.identifierhttp://dx.doi.org/10.1016/j.jece.2021.105761
dc.identifier.citationJournal of Environmental Chemical Engineering, v. 9, n. 4, 2021.
dc.identifier.doi10.1016/j.jece.2021.105761
dc.identifier.issn2213-3437
dc.identifier.scopus2-s2.0-85107435249
dc.identifier.urihttp://hdl.handle.net/11449/207839
dc.language.isoeng
dc.relation.ispartofJournal of Environmental Chemical Engineering
dc.sourceScopus
dc.subjectAntibiotics
dc.subjectAntimicrobial activity
dc.subjectAOP
dc.subjectNanoparticles
dc.subjectZVI
dc.titleCoupling Zero-Valent Iron and Fenton processes for degrading sulfamethazine, sulfathiazole, and norfloxacinen
dc.typeArtigo

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Artigos - Química Analítica - IQ